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Physics

Physics
Light travels slowest in

Vacuum
Air
Glass
Water

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Physics
For a freely falling body, the sum of kinetic energy and potential energy is always

Unity
Same
Variable
Zero

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Physics
Who is known as the 'father of quantum theory'?

Werner Heisenberg
Albert Einstein
Ernest Rutherford
Max Planck

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Physics
It is easy to burst a gas-filled balloon with a needle than with a nail. It is because

Nail is more longer than needle.
Nail exerts more pressure than needle on the balloon.
Gas is reactive with the needle.
Needle exerts more pressure than nail on the balloon.

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Physics
On which day 'National Science Day' is celebrated in India ?

43887
43886
43889
43884

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Physics
In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is

Decreased by 2%
Increased by 2%
Increased by 4%
Decreased by 4%

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